Method for Transmitting and Receiving Data in Wireless Communication System, and Wireless Communication Terminal

1. A terminal of a wireless communication system, the terminal comprising: a communication module; and a processor configured to control the communication module, wherein the processor is configured to, receive a preamble of a physical protocol data unit (PPDU) from an access point (AP), wherein the preamble comprises a universal signal (U-SIG) field and an extremely high throughput (EHT)-SIG field, wherein the U-SIG field includes an uplink (UL)/downlink (DL) field indicating whether the PPDU is an unlink PPDU or a downlink PPDU, and a type field indicating a type of the PPDU, and wherein the UL/DL field and the type field are used to identify whether the EHT-SIG field includes a resource unit (RU) allocation subfield, and receive a data of the PPDU, based on the U-SIG field and the EHT-SIG field.

2. The terminal of claim 1, wherein the EHT-SIG field comprises at least one content channel on a frequency domain, and wherein the number of the at least one content channel is recognized based on the U-SIG field.

3. The terminal of claim 2, wherein, when the type field indicates an orthogonal frequency division multiple access (OFDMA) transmission, the number of the at least one content channel is two.

4. The terminal of claim 1, wherein the EHT-SIG field includes the RU allocation subfield when i) the UL/DL field indicates a downlink and ii) the type field indicates that a downlink OFDMA is applied.

5. The terminal of claim 1, wherein the EHT-SIG field does not include the RU allocation subfield when i) the UL/DL field indicates a downlink and ii) the type field indicates that a downlink OFDMA is not applied.

6. The terminal of claim 1, wherein a modulation scheme of a second symbol of the U-SIG field is used to differentiate an extended range (ER) preamble from a multi user (MU) PPDU or a trigger based (TB) PPDU.

7. The terminal of claim 1, wherein the preamble of the PPDU is an extended range (ER) preamble when the modulation scheme of the second symbol is a quadrature binary phase shift keying (QBPSK).

8. The terminal of claim 1, wherein the type field is used to differentiate whether the PPDU is a multi user (MU) PPDU related to a single user or a trigger based (TB) PPDU.

9. A method for receiving data by a terminal in a wireless communication system, the method comprising: receiving a preamble of a physical protocol data unit (PPDU) from an access point (AP), wherein the preamble comprises a universal signal (U-SIG) field and an extremely high throughput (EHT)-SIG field, wherein the U-SIG field includes an uplink (UL)/downlink (DL) field indicating whether the PPDU is an uplink PPDU or a downlink PPDU, and a type field indicating a type of the PPDU, and wherein the UL/DL field and the type field are used to identify whether the EHT-SIG field includes a resource unit (RU) allocation subfield; and receiving a data of the PPDU, based on the U-SIG field and the EHT-SIG field.

10. The method of claim 9, wherein the EHT-SIG field comprises at least one content channel on a frequency domain, and wherein the number of the at least one content channel is recognized based on the U-SIG field.

11. The method of claim 10, wherein, when the type field indicates an orthogonal frequency division multiple access (OFDMA) transmission, the number of the at least one content channel is two.

12. The method of claim 9, wherein the EHT-SIG field includes the RU allocation subfield when i) the UL/DL field indicates a downlink and ii) the type field indicates that a downlink OFDMA is applied.

13. The method of claim 9, wherein the EHT-SIG field does not include the RU allocation subfield when i) the UL/DL field indicates a downlink and ii) the type field indicates that a downlink OFDMA is not applied.

14. The method of claim 9, wherein a modulation scheme of a second symbol of the U-SIG field is used to differentiate an extended range (ER) preamble from a multi user (MU) PPDU or a trigger based (TB) PPDU.

15. The method of claim 9, wherein the preamble of the PPDU is an extended range (ER) preamble when the modulation scheme of the second symbol is a quadrature binary phase shift keying (QBPSK).

16. The method of claim 9, wherein the type field is used to differentiate whether the PPDU is a multi user (MU) PPDU related to a single user or a trigger based (TB) PPDU.